SDSS-IV MaNGA: Stellar rotational support in disk galaxies vs. central surface density and stellar population age

Abstract

We investigate how the stellar rotational support changes as a function of spatially resolved stellar population age (${\mathrm{D}}_{\mathrm{n}}4000$) and relative central stellar surface density ($\Delta {\Sigma }_1$) for MaNGA isolated/central disk galaxies. We find that the galaxy rotational support ${\lambda }_{R_{\mathrm{e}}}$ varies smoothly as a function of $\Delta {\Sigma }_1$ and ${\mathrm{D}}_{\mathrm{n}}4000$. ${\mathrm{D}}_{\mathrm{n}}4000$ vs. $\Delta {\Sigma }_1$ follows a "J-shape", with ${\lambda }_{R_{\mathrm{e}}}$ contributing to the scatters. In this "J-shaped" pattern rotational support increases with central ${\mathrm{D}}_{\mathrm{n}}4000$ when $\Delta {\Sigma }_1$ is low but decreases with $\Delta {\Sigma }_1$ when $\Delta {\Sigma }_1$ is high. Restricting attention to low-$\Delta {\Sigma }_1$ (i.e, large-radius) galaxies, we suggest that the trend of increasing rotational support with ${\mathrm{D}}_{\mathrm{n}}4000$ for these objects is produced by a mix of two different processes, a primary trend characterized by growth in ${\lambda }_{R_{\mathrm{e}}}$ along with mass through gas accretion, on top of which disturbance episodes are overlaid, which reduce rotational support and trigger increased star formation. An additional finding is that star forming galaxies with low $\Delta {\Sigma }_1$ have relatively larger radii than galaxies with higher $\Delta {\Sigma }_1$ at fixed stellar mass. Assuming that these relative radii rankings are preserved while galaxies are star forming then implies clear evolutionary paths in central ${\mathrm{D}}_{\mathrm{n}}4000$ vs. $\Delta {\Sigma }_1$. The paper closes with comments on the implications that these paths have for the evolution of pseudo-bulges vs. classical-bulges. The utility of using ${\mathrm{D}}_{\mathrm{n}}4000$-$\Delta {\Sigma }_1$ to study ${\lambda }_{R_{\mathrm{e}}}$ reinforces the notion that galaxy kinematics correlate both with structure and with stellar-population state, and indicates the importance of a multi-dimensional description for understanding bulge and galaxy evolution.

24 pages, 22 figures (including Appendix), accepted for publication in MNRAS

References in corpus (41)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• The SAURON project -- IX. A kinematic classification for early-type galaxies
• Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies
• Compaction and Quenching of High-z Galaxies in Cosmological Simulations: Blue and Red Nuggets
• Structural Properties of Pseudo-Bulges, Classical Bulges and Elliptical Galaxies: an SDSS Perspective
• A primer on hierarchical galaxy formation: the semi-analytical approach
• The MaNGA Integral Field Unit Fiber Feed System for the Sloan 2.5 m Telescope
• The SDSS-IV MaNGA Sample: Design, Optimization, and Usage Considerations
• The Structure of Classical Bulges And Pseudobulges: The Link Between Pseudobulges And Sersic Index
• The Size Evolution of Star-forming and Quenched Galaxies in the IllustrisTNG simulation
• Bulge mass is king: The dominant role of the bulge in determining the fraction of passive galaxies in the Sloan Digital Sky Survey
• SDSS-IV MaNGA: Spatially resolved star formation histories in galaxies as a function of galaxy mass and type
• The SAMI Galaxy Survey: the link between angular momentum and optical morphology
• Angular momentum evolution of galaxies in EAGLE
• Stellar kinematics across the Hubble sequence in the CALIFA survey: General properties and aperture corrections
• z~2: An Epoch of Disk Assembly
• Kinematic modelling of the Milky Way using the RAVE and GCS stellar surveys
• Early formation of massive, compact, spheroidal galaxies with classical profiles by violent disc instability or mergers
• The shapes of galaxies in the Sloan Digital Sky Survey
• Quantifying the role of bars in the build-up of central mass concentrations in disk galaxies
• SDSS-IV MaNGA: Modeling the Spectral Line Spread Function to Sub-Percent Accuracy
• Disk Growth and Quenching
• The SAMI Galaxy Survey: Revising the Fraction of Slow Rotators in IFS Galaxy Surveys
• Inclination-Dependent Extinction Effects in Disk Galaxies in the Sloan Digital Sky Survey
• When the Jeans don't fit: How stellar feedback drives stellar kinematics and complicates dynamical modeling in low-mass galaxies
• Central Star Formation in Pseudobulges and Classical Bulges
• The CALIFA view on stellar angular momentum across the Hubble sequence
• Recovering ${\lambda }_R$ and $V/\sigma$ from seeing-dominated IFS data
• The SAMI Galaxy Survey: Decomposed Stellar Kinematics of Galaxy Bulges and Disks
• Bulges and disks in the local Universe. Linking the galaxy structure to star formation activity
• The SAMI Galaxy Survey: Mass and Environment as Independent Drivers of Galaxy Dynamics
• SDSS-IV MaNGA: Uncovering the Angular Momentum Content of Central and Satellite Early-type Galaxies
• A SAMI and MaNGA view on the stellar kinematics of galaxies on the star-forming main sequence
• Beyond galaxy bimodality: the complex interplay between kinematic morphology and star formation in the local Universe
• Most pseudo-bulges can be formed at later stages of major mergers
• The SAMI Galaxy Survey: The role of disc fading and progenitor bias in kinematic transitions
• The physical connection between central stellar surface density and stellar spin in SAMI and MaNGA nearby galaxies